Rock-drill extractor.



B. K.. SMITH.

ROCK DRILL EXTBAGTOR.

APPLIOATIOH nun 11120.21, 1910.

Patented 001;.31, 1911.

PATENT FFTQE.

EAR-L K. SMITH, F TONOPAH, NEVADA.

ROCK-DRILL EXTRACTOR.

; of Nevada, have invented new and useful Improvements in Rock-DrillExtractors, of which the following is a specification.

The present invention is designed primarily to supply a device whereby arock drill when bound may be easily removed from the opening.

The invention contemplates a clamp for gripping the tool and meanscooperating with the clamp for jarring the tool so as to loosen the sameand facilitate its removal from the opening.

The invention consists of the novel features, details of constructionand combination of parts, which hereinafter will be more particularlyset forth, illustrated in the accompanying drawing, and pointed out inthe appended claims.

Referring to the drawing, forming a part of the application, Figure 1 isa side view of an appliance embodying the invention.

Fig. 2 is a horizontal section thereof on the line 22 of Fig. 1. Fig. 3is a horizontal section of a modification.

Corresponding and like parts are referred to in the followingdescription, and indicated in all the views of the drawing, by the samereference characters.

The device consists essentially of a clamp and a jarring appliance forstarting the 2' tool or article to be loosened. The clamp is formed oftwo jaws l and 2 and a confining ring or band 3, the latter beingloosely connected to one of the jaws and serving to confine the otherjaw and cause an advance- 4 1 ment or pressing together of the jaws soas to grip the tool or article placed bet-ween them upon applying forceto one of the jaws in substantially the length of the clamp. Thegripping faces of the jaws may be of any formation to insure theirtaking a firm hold upon the tool or other article to be gripped thereby.In the preferred construction the gripping faces of the aws are serratedor roughened. The gripping faces of the jaws may be of any formation,but it is preferred to depress the gripping faces intermediate of theirlongitudinal edges so as to centralize the tool or other article heldbetween the jaws and thereby prevent lateral displacement thereof. Bymaking the Specification of Letters Patent.

Application filed. December 21, 1910.

Patented Got. 31, 1911.

Serial No. 598,507.

jaws hollow they are further enabled to more firmly grip the articleheld between them. One of the jaws, as 1, is straight whereas the otherjaw 2 is made tapering so as to operate by a wedge action. ring or band3 is loosely connected to the jaw 1 and the jaw 2 is adapted to movefreely through the ring or band 3. A set screw 4 may be threaded intothe part of the ring or band 3 opposite the outer inclined side of thejaw 2, thereby admitting of adjusting the jaw to the size of the tool orother article to be gripped. While it is preferred to employ a set screw4 the latter may be dispensed with, as indicated in Fig. 3.

' Thejarring device consists of a rod or The bar 5 which is connected tothe movable jaw 2 and a hammer 6 slidably mounted upon the rod 5. A knob7 is formed upon the upper end of the rod 5 and is adapted to be engagedby the hammer 6 so as to jar the clamp sufiiciently to loosen or startthe tool gripped between the jaws 1 and 2. The rod or bar 5 may be ofany length and its lower end is looped into an eye formed in the uppersmaller end of the jaw 2, thereby admitting of turning the rod 5 to anyposition as well as to fold the same upon the clamp to reduce the lengthof the device when not required for immediate service.

In practice suppose it be required to remove a drill from an opening ina rock, the projecting end of the drill 8 is introduced between the jaws1 and 2, afterwhich the jaw 1 is held and the jaw 2 moved longitudinallywhen at the same time it will be pressed inward toward the jaw 1 by itsouter inclined side riding upon the inner edge of the ring or band 3,thereby causing the two jaws to grip the drill 8 or like part betweenthe jaws. After the clamp has been placed in position upon the drill orlike part it is held in place by one hand and the other hand grasps thehammer 6 and moves the same upwardly on the rod 5 into contact with theknob 7, thereby imparting an upward blow to the clamp, which serves totighten the same upon the drill and also to jar the drill which tends toloosen the same. The operation is repeated until the drill is loosenedsufficiently to enable its ing attached at one end to the ring or band 3and at its opposite end to the jaw 2, as indicated most clearly in Fig.1.

From the foregoing description, taken in connection with theaccompanying drawing, the advantages of the construction and of themethod of operation will be readily apparent to those skilled in the artto which the invention appertains, and while I have described theprinciple of operation of the invention, together with the device whichI now consider to be the embodiment thereof, I desire to have itunderstood that the device shown is merely illustrative, and that suchchanges may be made when desired as are within the scope of the claimsappended hereto.

Having thus described the invent-ion what is claimed as new, is

1. An extractor for removing drills and like tools, the same comprisingaclamp to be fitted to the part to be removed, a rod connected to theclamp and having a stop, a hammer slidably mounted upon the roe, andmeans utilizing the blow of the hammer to tighten the grip of the clampand to loosen the part to be removed.

An extractor for removing drills, tools and the like, the samecomprising a clamp, a rod connected to one member of the clamp andhaving a stop, a hammer slidably mounted upon the rod, and meansconnecting the members of the clamp to tighten their grip by the blow ofthe hammer to loosen the part to be removed.

3. An extractor of the character described comprising two jaws,connecting means be tween the two jaws to effect a closing thereof uponimparting longitudinal movement to one of the jaws, a rod connected tothe movable jaw and having a stop, and a ham mer mounted upon the rod toimpart a blow thereto.

l. An extractor for the purpose set forth comprising two jaws, a bandhaving connection with one of the jaws and receiving the other jaw whichlatter is movable and of wedge form, and jarring means connected to themovable jaw for imparting blows thereto.

5. An extractor of the character set forth comprising a straight jaw, aband loosely connected thereto, a second jaw tapering in length andpassing loosely through the said band, a rod connected with the movablejaw and having a stop, and a hammer slidably n'lounted upon the rod.

6. An extractor comprising a jaw, a band loosely connected with the jaw,a tapered jaw slidably mounted within said band, a jarring deviceapplied to the movable jaw, and a set screw fitted to the said band andadapted to have its inner end engage the outer inclined side of thetapered jaw.

in testimony whereof I aflix my signature in presence of two witnesses.

EARL K. SMITH.

Witnesses J. D. DOBBINS, SAMUEL FRoEDn.

Copies of this patent may be obtained for five cents each, by addressingthe fiomniissioner of Patents, Washington, D. C.

